responded
v.v. to say or write something as an answer. You also use this when you react to something that happens, like moving your hand away from a hot stove.
v. to say or write something in reply; to react to a stimulus or situation. Transitive when taking a 'that' clause; otherwise intransitive and typically followed by the preposition 'to'.
She responded to my email within an hour.
The emergency services responded to the call in less than five minutes, arriving before the fire could spread.
While the market initially dipped, investors responded to the central bank's announcement with cautious optimism, leading to a steady recovery by the end of the trading day.
The verb is typically intransitive and requires the preposition 'to' before the object.
He responded me yesterdayHe responded to me yesterdayRespond is an intransitive verb and cannot take a direct person object; it must be followed by 'to'.